DL, you are a wealth of knowledge. And I'd like to take this opportunity to thank you for the simplicity and thoroughness of your scholarship on these topics, especially in light of the normal very low signal-to-noise ratio that we usually encounter on internet info sharing sites.

OK, enough praise-singing. Can you elaborate on this phrase a bit? It's the only part of the Rafendach system that's not clear to me.

"A cross-beam (Trämbalke) secured the eaves walls of a timber framed structure from working inward under the pressure of the roof. The roof is ‘Drücklastig’"